搜题请搜索小程序“爱下问搜题”
问题
判断题
摩擦力与摩擦面积的大小成正比。
答案
参考答案：
错
补全对话，情景问答
给下列的问句选择合适的答语。
( ) 1. How's the weather?
( ) 2. Where do you work?
( ) 3. What does he do?
( ) 4. What is it?
( ) 5. What do you want to do?
A. It's a mall.
B. He is a clerk.
C. It's hot.
D. I want to buy a dress.
E. I work in a store.
查看答案
单项选择题
构成心腰部的主要是( )
A．支气管分叉处
B．主动脉弓
C．肺动脉段及左心房
D．右心室
E．左心室
查看答案
